Standardized Precipitation Index Table

Upper Platte Climate Division

Wyoming, Climate Division 10

Precipitation Data Table

Time Scale in Months (As of the end of Mar. 2024)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 1.3 2.59 3.35 3.86 4.47 5.66 6.34 7.97 9.05 11.71 12.81 14.37 18.1 20.91 28.05 33.49 39.93 49.08 62.48 74.16
Accumulated Precipitation Departure from Normal (in.) 0.23 0.67 0.63 0.31 0.11 0.2 -0.18 0.53 0.56 1.99 1.31 1.3 2.31 2.38 1.91 1.9 0.72 -3.24 -2.95 -4.38
Accumulated Precipitation Percent of Average 121 135 123 109 102 104 97 107 107 120 111 110 115 113 107 106 102 94 95 94
Accumulated Precipitation Percentile (non-exceedance) 73.4 88.1 81.9 67.5 57.3 59.8 46.7 67.6 66.4 86.4 75.5 73.5 84.3 82.1 73.5 71.6 58.5 24 28.2 21.3
Standardized Precipitation Index 0.63 1.18 0.91 0.45 0.18 0.25 -0.08 0.46 0.42 1.1 0.69 0.63 1 0.92 0.63 0.57 0.21 -0.71 -0.58 -0.8